Augustus



(No Model.)

A. O. PALMER.

ELEGTRO MAGNETIC ANNUNOIATOR.

No. 307,866. Patented Nov. 11, 1884.

N. PETERS. Pnommna m. Washinglcn. n. c.

AUGUSTUS O. PALMER,

OF UTIOA, NEWV YORK.

ELECTRO-MAGNETIC ANNUNCIATOR.

SPECIFICATION forming part of Letters Patent No. 307,866, dated November11, 1884.

Application filed April 12, 1884. (N 0 model.)

To all whom it may concern.-

Be it known that I, AUGUSTUS O. PALMER, a citizen of the United States,residing at Utica, in the county of Oneida and State of New York, haveinvented a new and useful Improvement in Electric Annunciators, of whichthe following is a specification, reference being had to theaccompanying drawings.

The object of my invention is to provide an annunciator especiallyadapted for night-bell attachments in an exchange for telephones orburglar-alarms, or where a continuous sound ing of an alarm is required.

My invention consists in the combination of an armature, a plate onwhich is the number or other character, and a blind therefor, with anelectro-magnet, substantially as hereinafter set forth, and specificallypointed out in the claims.

In the drawings, Figure 1 is a front view, and Fig. 2 a side View, of anelectric annunciator embodying my invention, the blind being up; Fig. 3is a front view,and Fig. 4 avertical section,of the same, the blindbeing down. Fig. 5 is a plan view.

The supporting-frame A has a vertical part, a, and a horizontal part orarm, Z).

To the part a is secured an electro-magnet, B, being fastened thereto ina horizontal position by screws 0 c, and insulated therefrom by means ofwashers d of insulating material. The armature O, which may be ofsuitable size and shape to form a plate on which is the numeral 0, orother required character, is pivoted to the arm b at f, which is at adistance from the face of the armature and plate to the rear so that itwillincline to the poles of the magnet. At the lower part of thearmature and plate 0 a blind, D, is pivoted by means of a pivot at g,held by projections h h, so that the blind when up inclines to thearmature. A rod or arm, E, extends from the vertical part of the frame Aand through the plate 0 to meet the blind, as shown. The coils of theelectro-magnet are in the main-line circuit, the projecting wires i ibeing a part of said circuit, there being, of course, the requiredbattery and make -and break pieces in said circuit. The local circuitincludes a battery,

j, and alarm device, as the bell is. the wires of this circuit isconnected to the frame A, as at Z, and the other to the core of themagnet, as by means of one of the screws 0. The blind being up, as inFigs. 1, 2, and 5, when the main-line circuit is closed the armature isattracted to the poles of the magnet, and swings so as to bring theblind D against the arm E, whereby the blind is thrown down, taking theposition shown in Figs. 3 and 4. Astop, m, may prevent the blind fromfalling to a vertical position. When the blind is thrown down,the figureon the plate 0 will be exposed to view, and the blind will cause thearmature to press against the poles of the magnet. Thus the localcircuit will be completed by means of the frame A, armature, and core ofthe magnet, causing the electric bell 70,. or other alarm, to sounduntil the blind is raised.

I claim as my i nvention 1. The combination of an electro magnet, anarmature and plate pivoted to the supporting frame, as specified, and ablind pivoted to said armature and plate, substantially as and for thepurpose set forth.

2. The combination of the frame having vertical part a and arm b,electro-magnet, armature and plate G, and blind D, said armature andplate being pivoted to said frame, as specified, and said blind beingpivoted to said plate, substantially as and for the purpose set forth.

3. The combination of frame A, electromagnet, armature and plate 0,blind D, and arm E, substantially as and for the purpose specified.

4. In an electric annunciator, an armature having a numeral or othercharacter thereon, and a blind for covering the same, substantially asspecified.

5. In an electric annunciator, an armature pivoted to thesupporting-frame, and a blind pivoted to said armature, substantially asdescribed.

AUGUSTUS O. PALMER. Vitnesses:

EUGENE B. HASTINGS, G130. D. FRANK.

One of 5i

